Ancient machines buried beneath the earth. Forbidden magic whispered through bloodstained ruins. And a soldier running from a war he cannot forget. Lieutenant Bram Korthais joins a secret expedition into the Underlands: a vast, hidden realm of darkness and lost empires. Their mission: to recover legendary war constructs that could change the tide of power forever. With them travels Ronus, a scholar whose quest for knowledge hides a darker obsession, and Esmee, a mysterious woman from an ancient underground civilization who acts as their guide in this deadly world. Facing monstrous sea creatures, treacherous labyrinths, and the growing shadow of betrayal, they uncover the Mask of Night: an artifact of unspeakable power hidden deep below golden ruins. To keep it from falling into the wrong hands, Bram must risk not just his life but the fate of everyone he swore to protect. Dark secrets awaken in the Citadel of Gold. Some were meant to stay buried...